No Load Test

Connect a voltmeter, ammeter and battery leads to alternator. Open switch "SW1" and close switch "SW2". Gradually raise alternator speed, and read speed when voltage is 13.5 volts. Alternator is working properly if alternator turns at less than 1000 RPM.

Fig 1: Alternator Terminal Identification Terminals "S", "L", "BAT" and "E" are marked on rear cover.